Finding the Fourth Proportional to 9,507.78, 13,120.50 and 5,258.73

Step by Step Solution

1. Step 1: Write the proportion equation
   9,507.78 : 13,120.50 = 5,258.73 : x
2. Step 2: Convert to fraction form
   9,507.78/13,120.50 = 5,258.73/x
3. Step 3: Cross multiply
   9,507.78x = 13,120.50 × 5,258.73
4. Step 4: Simplify right side
   9,507.78x = 68,997,101.36
5. Step 5: Solve for x
   x = 68,997,101.36/9,507.78
6. Step 6: Final answer
   x = 7,256.91